diff -ruN scriptaculous-1.9.0.orig/debian/changelog scriptaculous-1.9.0/debian/changelog
--- scriptaculous-1.9.0.orig/debian/changelog	2011-08-21 16:50:00.000000000 -0400
+++ scriptaculous-1.9.0/debian/changelog	2011-08-21 17:21:57.000000000 -0400
@@ -1,3 +1,12 @@
+scriptaculous (1.9.0-2.1) unstable; urgency=low
+
+  * Non-maintainer upload.
+  * Break old versions of libjs-protoaculous which attempt to patch
+    scriptaculous.js but have conflicted since the 1.9.0 upstream release,
+    as reported in #619031.
+
+ -- Benjamin Kaduk <kaduk@mit.edu>  Sun, 21 Aug 2011 16:56:11 -0400
+
 scriptaculous (1.9.0-2) unstable; urgency=low
 
   * push package to unstable
diff -ruN scriptaculous-1.9.0.orig/debian/control scriptaculous-1.9.0/debian/control
--- scriptaculous-1.9.0.orig/debian/control	2011-08-21 16:50:00.000000000 -0400
+++ scriptaculous-1.9.0/debian/control	2011-08-21 16:56:06.000000000 -0400
@@ -10,6 +10,7 @@
 Architecture: all
 Depends: ${misc:Depends}, libjs-prototype
 Replaces: scriptaculous
+Breaks: libjs-protoaculous (<= 3)
 Description: JavaScript library for dynamic web applications
  script.aculo.us is a JavaScript library providing dynamic visual effects and
  user interface elements via the Document Object Model.